This Master Lock Bike U Lock is made of hardened steel and is designed to be durable and heavy-duty. It comes with two keys and a carrier bracket, making it easy to use and transport. The lock is medium-sized, measuring 7.25" x 8" and is portable. The black color and Master Lock brand name make it a stylish and reliable choice for cyclists. This bike lock is perfect for those who want to keep their bike secure and safe. Unsure if this is the same carrier bracket.